GMRT LBDS-Lynx: 150-MHz Radio Source Catalog for High-Redshift Galaxy Candidates

765 radio sources detected at 150 MHz by the Giant Metrewave Radio Telescope, covering a 15 square degree area. The catalog, created by NASA's HEASARC in 2012, provides spectral indices for 83% of its sources, with a median of 0.78, and identifies about 150 sources with spectra steeper than 1 as candidate high-redshift radio galaxies.

Use Cases

• Identifying candidate high-redshift radio galaxies based on steep spectral index values mentioned in the description.
• Cross-matching radio source catalogs using the 150-MHz positions and higher-frequency observations referenced.
• Analyzing the spectral index distribution of a low-frequency radio source population.
• Training models to predict source characteristics from flux density and spectral index data.

Strengths

• Deep low-frequency image with an rms noise of ~0.7 mJy beam^-1.
• Catalog contains 765 sources with spectral indices determined for 639 (83%) of them.
• Covers a well-studied field with complementary observations from multiple telescopes (WSRT, VLA).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-03-13 19:27:15.663369; freshness should be verified.

Provenance

Source

National Aeronautics and Space Administration (NASA), HEASARC, based on CDS Catalog J/MNRAS/405/436.

Collection Method

Observations from the Giant Metrewave Radio Telescope (GMRT) at 150 MHz, cross-correlated with other radio surveys.

Time Range

Observations likely from the early 2000s; catalog created by HEASARC in February 2012.

Freshness

Last updated 2026-03-13 19:27:15.663369.

Geography

Covers the LBDS-Lynx field, an area of about 15 square degrees on the sky.